Hangzhou along the eastern coast has a humid subtropical monsoon climate which has temperate and humid weather; adequate sunshine, heat and precipitation; and four distinct seasons. With the change of the seasons and of the winter and summer monsoons, a climate comes into being featuring rainy spring, hot and humid summer, crisp autumn, dry and cold winter. The sunshine, heat and precipitation match well with each other. Starting from spring, solar radiation, temperature and precipitation rise from day to day. At the turn of spring and summer in June, precipitation reached its peak, accompanies by temperature rise. At the height of summer in July and August under the control of the subtropical high pressure precipitation reduces and the hottest part of summer arrives. When summer turns gradually into autumn in September, there is simultaneous reduction in sunshine, heat and precipitation. When the autumn rainy season comes under the dual impact of the tropical storm (Typhoon) and cold air, the summer drought is greatly eased. In October and November the continental cold high takes control, the weather clears up with abundant sunshine, large day-night temperature difference and better sunshine and heat conditions than in spring. In the coolest season of winter, the sunshine, heat and precipitation reach the lowest point.

Pressure

monthly mean atmospheric pressure

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pressure(hPa)

10217

10195

10157

10103

10062

10016

9999

10012

10081

10148

10193

10220

Pressure (hPa)

10217

10195

10157

10103

10062

10016

9999

10012

10081

10148

10193

10220

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.1 monthly mean pressure

Temperature

monthly mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Temp(oF)

39.7

42.2

49.2

60.4

69.2

75.9

83.1

82.2

74.1

64.9

54.3

44.2

Temp(oC)

4.3

5.7

9.6

15.8

20.7

24.4

28.4

27.9

23.4

18.3

12.4

6.8

Temperature (oC|oF)

4.3 oC 39.7 oF

5.7 oC 42.2 oF

9.6 oC 49.2 oF

15.8 oC 60.4 oF

20.7 oC 69.2 oF

24.4 oC 75.9 oF

28.4 oC 83.1 oF

27.9 oC 82.2 oF

23.4 oC 74.1 oF

18.3 oC 64.9 oF

12.4 oC 54.3 oF

6.8 oC 44.2 oF

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.2 monthly mean temperature

monthly extreme mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

34.7

36.8

43.5

53.7

62.6

69.9

76.8

76.1

68.5

59

48

38.1

Min Temp (oC)

1.5

2.7

6.4

12.1

17

21.1

24.9

24.5

20.3

15

8.9

3.4

Max Temp (oF)

46.4

48.9

56.6

69

77.9

83.4

91.4

90.3

81.5

72.8

62.2

51.9

Max Temp(oC)

8

9.4

13.7

20.6

25.5

28.6

33

32.4

27.5

22.7

16.8

11.1

monthly extreme daily temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

16.5

20.8

28.5

32.3

48.2

55

63.5

65.6

53.6

39.2

28.4

16.8

Min Temp (oC)

-8.6

-6.2

-1.9

.2

9

12.8

17.5

18.7

12

4

-2

-8.4

Max Temp (oF)

73

82.5

86.7

91.5

96

99.3

103.8

102.2

101.6

95

83.6

75.5

Max Temp (oC)

22.8

28.1

30.4

33.1

35.6

37.4

39.9

39

38.7

35

28.7

24.2

Humidity

monthly mean hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity (%)

76

76

78

76

76

82

78

79

81

78

74

72

Hunidity (%)

76

76

78

76

76

82

78

79

81

78

74

72

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.3 monthly mean hunidity

monthly minimum daily hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity(%)

10

14

8

15

13

23

34

34

20

21

13

11

Precipitation

monthly mean precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

73.2

84.2

138.2

126.6

146.6

231.1

159.4

155.8

145.2

87

60.1

47.1

Days (Precipitation<0.1mm)

12.4

12.3

16.3

15.2

14.6

15.2

13

13.6

12.6

10

8.6

8.1

Days (Precipitation<10mm)

2.5

2.9

5.1

4.7

4.9

6.6

4.7

4.5

4.5

2.9

2

1.5

Days (Precipitation<25mm)

.4

.5

1.1

1

1.8

3.4

1.9

1.8

2

.9

.5

.2

Days (Precipitation<50mm)

0

0

.1

.1

.3

1.1

.7

.6

.4

.1

.1

0

Precipitation (mm)

73.2

84.2

138.2

126.6

146.6

231.1

159.4

155.8

145.2

87

60.1

47.1

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.4 monthly mean precipitation

monthly maximum daily precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

56.7

50

96

90.3

85.2

136.4

109.6

127.2

103.5

80.9

66.8

42.9

Wind

monthly mean wind speed

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed(m/s)

2.3

2.4

2.4

2.4

2.3

2.3

2.5

2.5

2.4

2.2

2.2

2.2

Wind Speed (m/s)

2.3

2.4

2.4

2.4

2.3

2.3

2.5

2.5

2.4

2.2

2.2

2.2

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean wind speed

monthly maximum daily
wind speed and direction

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed (m/s)

12.3

15

15

17

16.7

13.7

14

23

14

13

13

12.7

Sunshine

monthly mean sunshine duration

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Duration (hour)

107.2

99.1

109.5

140.6

163.3

141.9

216.1

209.5

147.2

148.3

137.6

136.2

Duration (hour)

107.2

99.1

109.5

140.6

163.3

141.9

216.1

209.5

147.2

148.3

137.6

136.2

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean sunshine duration

monthly sunshine percentage

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Percentage (%)

33

32

30

37

39

34

50

51

40

42

43

43

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.